Fierro, 46, has been the subject of a recent police investigation into a string of thefts at various Los Alamos fire stations. His name surfaced after Los Alamos police detectives analyzed fire logs to determine who was on duty when money went missing.

Det. Sgt. Fred Rascon and Det. Shari Mills set up a sting operation Monday applying theft detection powder to $100 in small bills, according to the police report.

The money was placed in a deposit bag used by a fellow firefighter whose money was stolen from his workplace in the past.

The bag was left in the typical location at Fire Station 6 near the Los Alamos County Airport where it had previously disappeared.